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Subj : Re: mutex problem
To   : comp.programming.threads
From : David Schwartz
Date : Fri Jun 17 2005 12:50 pm


"LinuxGuy" <rahul.ruikar@gmail.com> wrote in message 
news:1118993531.608953.234730@o13g2000cwo.googlegroups.com...

> here I want to update "sampleString" and  this function will be
> called from any other cpp file but at that time "threadFunction may
> have  locked the resources. and using "sampleString" can you please
> tell me how to protect data or to execute functions without affecting
> each others data

    You just simply cannot do this. You cannot create a sensible function 
that manipulates a particular structure without knowing whether or not that 
structure is already locked.

    You should create two versions of this function, one that can only be 
called with the lock held and one that can only be called without the lock 
held. The version called without the lock held can simply acquire the lock 
and then call the other version.

    DS

.

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